I have several favourite players beside Roger atm, highest of which are Youzhny and Wawrinka, but none close to his level. When he meets any on them I root for Roger pretty much regardless of circumstances, and still feel nervous on his behalf, as demonstrated in Halle 2013 when I really wanted him to win against Youzhny despite Youzhny also needing a tournament win (which I'm happy he got a bit later
). I wasn't too sorry to see him lose to Haas in Halle 2012, though, as Roger was in a very good place then and Haas needed it more at that stage.
Last time I had a more "evenly matched" favourite was in Safin. For their AO meetings in 2004 and 2005 I was quite relaxed, I didn't mind very much who won and was just enjoying the match. It's really been a while since I had that feeling in a close match involving Roger